equipment recommendation - what is the best compact system camera for taking low light shots in nightclubs?

I'm looking for a compact system camera ( maybe mirrorless it's more correct as a definition, i mean a camera where you can change lenses but it's not a full DSLR ) which i would mainly use to shoot photo in nightclubs.
I like a lot the Panasonic Lumix GF 6 because of the features it has like NFC and Wi-Fi and the price tag is about right, about 600€, but i've never bought a camera before and i don't know how different cameras fare in low light conditions?